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Algal biomarkers in surface waters around the Crozet plateau

Algal biomarkers in surface waters around the Crozet plateau
Algal biomarkers in surface waters around the Crozet plateau
The region around the Crozet plateau (Southern ocean) exhibits enhanced annual primary productivity, occurring during a distinct spring bloom, due to natural iron fertilisation of the macro nutrient-replete polar frontal zone. We describe differences in algal biomarker abundances and distributions, with particular emphasis on alkenones and sterols, around the Crozet plateau during an algal bloom (December 2005 to January 2006). In the centre of the bloom, diatom-derived sterols dominate, whereas alkenones are proportionally more abundant at lower productivity times or sites. This is consistent with biomarker analyses for other settings and suggests that high productivity and high nutrient, low chlorophyll (HNLC) regimes can be distinguished on the basis of algal community structure and the associated lipid biomarker assemblages.

0146-6380
1051-1057
Hernandez, Maria T.
b83b48a6-7956-49f5-9204-96c56fe37ac8
Mills, Rachel A.
a664f299-1a34-4b63-9988-1e599b756706
Pancost, Richard D.
5914e19e-7777-4304-9fd8-86e2e9cfe8a1
Hernandez, Maria T.
b83b48a6-7956-49f5-9204-96c56fe37ac8
Mills, Rachel A.
a664f299-1a34-4b63-9988-1e599b756706
Pancost, Richard D.
5914e19e-7777-4304-9fd8-86e2e9cfe8a1

Hernandez, Maria T., Mills, Rachel A. and Pancost, Richard D. (2008) Algal biomarkers in surface waters around the Crozet plateau. Organic Geochemistry, 39 (8), 1051-1057. (doi:10.1016/j.orggeochem.2008.04.015).

Record type: Article

Abstract

The region around the Crozet plateau (Southern ocean) exhibits enhanced annual primary productivity, occurring during a distinct spring bloom, due to natural iron fertilisation of the macro nutrient-replete polar frontal zone. We describe differences in algal biomarker abundances and distributions, with particular emphasis on alkenones and sterols, around the Crozet plateau during an algal bloom (December 2005 to January 2006). In the centre of the bloom, diatom-derived sterols dominate, whereas alkenones are proportionally more abundant at lower productivity times or sites. This is consistent with biomarker analyses for other settings and suggests that high productivity and high nutrient, low chlorophyll (HNLC) regimes can be distinguished on the basis of algal community structure and the associated lipid biomarker assemblages.

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Published date: August 2008

Identifiers

Local EPrints ID: 63932
URI: http://eprints.soton.ac.uk/id/eprint/63932
ISSN: 0146-6380
PURE UUID: 497e2076-365e-4dda-93a1-96252ec44e4a
ORCID for Rachel A. Mills: ORCID iD orcid.org/0000-0002-9811-246X

Catalogue record

Date deposited: 19 Nov 2008
Last modified: 16 Mar 2024 02:45

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Contributors

Author: Maria T. Hernandez
Author: Rachel A. Mills ORCID iD
Author: Richard D. Pancost

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